Dne 23.12.2011 22:37, Pavel Stehule napsal(a):
2011/12/23 Tom Lane<t...@sss.pgh.pa.us>:
Tomas Vondra<t...@fuzzy.cz>  writes:
The motivation for this patch was that collection timing data often
causes performance issues and in some cases it's not needed. But is this
true for row counts?

Perhaps more to the point, is there a use case for collecting timing
data without row counts?  I find it hard to visualize a valid reason.

yes - a searching of bad prediction

But that's the purpose of collecting row counts without timing data.

TL is asking about the opposite case - collecting timing data without row counts. I can't imagine such use case ...


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